const alias = {
  js: "application/javascript", // Content-Type
  css: "text/css",
  html: "text/html",
  json: "application/json",
};
// express res.send
function send(req, res, content, type) {
  res.setHeader("Content-Type", alias[type]);
  res.statusCode = 200;
  // 写入响应并且结束响应
  return res.end(content);
}
module.exports = send;
